Thanks Dewey!  That did the trick.  

Changed:
# try to use minimum height if less than 3 columns
1653 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1653>
         if nparms > 20:
1654 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1654>
             rowmax = 10
1655 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1655>
         else:
1656 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1656>
             rowmax  = int(nparms/2 + 0.5)

To:
# try to use minimum height if less than 3 columns
1653 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1653>
         if nparms > 20:
1654 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1654>
             rowmax = 18
1655 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1655>
         else:
1656 
<http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1656>
             rowmax  = 18

And now it fills a column (up to 18 rows) before creating a second column, 
which is what I want.

-Tom


> On Jun 4, 2017, at 3:20 PM, Dewey Garrett <dgarr...@panix.com> wrote:
> 
>> I have quite a bit of vertical space and am wondering if
>> there is a way I can force the subroutine parameters to
>> be displayed in only 2 columns
> 
> You would have to alter the logic for computing 'rowmax'
> for the parameter entryboxes.  The source file in the git
> tree is:
>  git_root_dir/lib/python/pyngcgui.py
> 
> The logic for 'rowmax' is (ref git tree for 2.7):
> 
> http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=lib/python/pyngcgui.py;h=bdb08e4d210c5b09c280d81a695d286f3e3a1c37;hb=refs/heads/2.7#l1652
> 
> For a deb install, root privs will be needed to edit the file;
> the file location can be found using:
> 
> $ dpkg -L linuxcnc|grep pyngcgui.py
> /usr/share/pyshared/pyngcgui.py
> 
> -- 
> Dewey Garrett
> 
> 
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